Why do some building projects succeed and others fail? It all comes down to how well you manage your project. I’m Mark Siddall, architect, founder and director of low energy architecture at LEAP. I'm passionate about enabling people to lead happier, healthier and more fulfilling lives by helping them create a happier, healthier, more comfortable lifestyle in beautiful, quality assured, ultra low energy homes, workplaces and communities.Many of the projects that I work on satisfy the internationally renowned Passivhaus Standard though, with the qualifying clients, I do work on other projects.“Mark is one of the pioneers to introduce Passivhaus to the UK. His experience and ongoing research into building performance makes him one of the UK’s most skilled and knowledgeable Passivhaus Architects. ...I have no doubt that Mark Siddall’s buildings also offer an economical attractive solution to the investors.”- Prof. Wolfgang Feist, creator of the Passivhaus Standard“Mark has a true passion for his work. He has a wealth of knowledge on a wide range of construction and energy related issues and is committed to designing and constructing buildings that attempt to perform ‘as designed’. ...It has been a joy to work with someone so committed and knowledgeable.”- Dr David Johnston, Leeds Beckett University "Mark's technical knowledge of low carbon design and building performance is breathtaking and importantly for me he also has an eye in what it would take from a construction perspective."- Allan Thompson, Managing Director, Gentoo Group "Mark takes a highly analytical and technically expert approach to his work, and is one of the most knowledgeable people about building performance that I’ve ever met."- Jon Bootland, CEO, Passivhaus Trust